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Finding the Fourth Proportional to 139,447.28, 208,654.14 and 83,317.92

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Solution

The fourth proportional to 139,447.28, 208,654.14 and 83,317.92 is: 124,668.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,447.28 : 208,654.14 = 83,317.92 : x
  2. Step 2: Convert to fraction form
    139,447.28/208,654.14 = 83,317.92/x
  3. Step 3: Cross multiply
    139,447.28x = 208,654.14 × 83,317.92
  4. Step 4: Simplify right side
    139,447.28x = 17,384,628,944.19
  5. Step 5: Solve for x
    x = 17,384,628,944.19/139,447.28
  6. Step 6: Final answer
    x = 124,668.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.